Long-Term Debt (Subordinated Convertible Notes) (Details) - North America [Member] - Subordinated Convertible Notes Due 2029 [Member] - USD ($)	Dec. 15, 2009	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt principal amount	$ 429,500,000.0
Nonconvertible debt borrowing rate on debt instrument issuance date	12.50%
Liability component of convertible notes	$ 162,900,000	$ 429,500,000	$ 429,500,000
Unamortized discount	266,600,000	$ 257,800,000	$ 259,700,000
Debt issuance costs	$ 14,500,000